202120110101209 has 2 divisors, whose sum is σ = 202120110101210. Its totient is φ = 202120110101208.

The previous prime is 202120110101177. The next prime is 202120110101213. The reversal of 202120110101209 is 902101011021202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168734826101209 + 33385284000000 = 12989797^2 + 5778000^2 .

It is a cyclic number.

It is not a de Polignac number, because 202120110101209 - 2⁵ = 202120110101177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202120110101209.

It is not a weakly prime, because it can be changed into another prime (202120110101309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101060055050604 + 101060055050605.

It is an arithmetic number, because the mean of its divisors is an integer number (101060055050605).

Almost surely, 2^{202120110101209} is an apocalyptic number.

It is an amenable number.

202120110101209 is a deficient number, since it is larger than the sum of its proper divisors (1).

202120110101209 is an equidigital number, since it uses as much as digits as its factorization.

202120110101209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 202120110101209 in words is "two hundred two trillion, one hundred twenty billion, one hundred ten million, one hundred one thousand, two hundred nine".